<!DOCTYPE html> <html> 
<head>    
	<meta charset="utf-8" />    
	<meta name="viewport" content="width=device-width" />    
	<title>extjs4.2</title>    
	<link href="__PUBLIC__/ext42/resources/css/ext-all-neptune.css" rel="stylesheet" />    
	<script src="__PUBLIC__/ext42/bootstrap.js"></script>
	<script src="__PUBLIC__/ext42/locale/ext-lang-zh_CN.js"></script>    
</head> 
<style type="text/css">
	.x-form-codes{ margin-left: 55px;}
</style>
<body>    

<script type="text/javascript">
	//定义验证码控件  
	Ext.define('CheckCode',{  
	    extend: 'Ext.form.field.Text',   
	    alias: 'widget.checkcode',  
	    inputTyle:'codefield',  
	    codeUrl:Ext.BLANK_IMAGE_URL,  
	    isLoader:true,
	    onRender:function(ct,position){  
	        this.callParent(arguments);  
	        this.codeEl = ct.createChild({ tag: 'img', src: Ext.BLANK_IMAGE_URL});  
	        this.codeEl.addCls('x-form-code');  
	        this.codeEl.on('click', this.loadCodeImg, this);  
	          
	        if (this.isLoader) this.loadCodeImg();  
	    },  
	    alignErrorIcon: function() {  
	        this.errorIcon.alignTo(this.codeEl, 'tl-tr', [2, 0]);  
	    },  
	    //如果浏览器发现url不变，就认为图片没有改变，就会使用缓存中的图片，而不是重新向服务器请求，所以需要加一个参数（如：Math.random()），改变url 
	    loadCodeImg: function() {  
	    	this.codeEl.addCls('x-form-codes');  
	        this.codeEl.set({ src: '{:U('index/verify')}'+'?id=' + Math.random() });  
	    }  
	});
	
    Ext.onReady(function(){
			var checkcode = Ext.create('CheckCode',{  
                fieldCls : 'checkcode-ico',  
                fieldLabel : '验证码',  
                name : 'verify',  
                id : 'verify',  
                allowBlank : false,  
                isLoader:true,  
                blankText : '请输入验证码',  
				emptyText: '请输入验证码',
                codeUrl: 'getCode',
            });
			
			
        Ext.create('Ext.window.Window', {
            title: '用户登录',
            draggable: false,
            closable: false,
			resizable : false,
            layout: 'fit',
            items: { 
                xtype: 'form',
                id: 'loginform',
				bodyPadding : 20,
                defaultType: 'textfield',
                shrinkWrap: 3,
                bodyCls: 'loginformbg',
                fieldDefaults: {
                    allowBlank: false,
                    labelAlign: 'center',
                    labelWidth: 50,
                    labelSeparator: '',
					vtype : 'alphanum',
					vtypeText : '只能是数字或字母'
                },
                items: [{
                    fieldLabel: '用户名',
                    name: 'username',
					id:'username',
                    emptyText: '请输入用户名',
                    fieldCls: 'username-ico'						
                }, {
                    fieldLabel: '密&nbsp;&nbsp;码',
                    name: 'password',
					id:'password',
                    emptyText: '请输入密码',
                    inputType: 'password',
                    fieldCls: 'userpassword-ico'
                
                }, checkcode]
            },
			buttons: [
			  {
                    text: '登录',
                    iconCls: 'Doorin',
                    id: 'loginbtn',
                    handler: function(){
                        //得到form  
                        var basic = Ext.getCmp('loginform');
                        if (basic.isValid()) {
                            basic.submit({
                                waitMsg: '正在登录,请等待...',
                                clientValidation: true,//要经过客户端验证的  
                                url: '{:U('login')}',
                                method: 'POST',
                                success: function(form, action){
										Ext.Msg.alert('提示', '登录成功，页面正在跳转……');
                                        window.location.href=action.result.url;
                                },
                                failure: function(form, action){
                                    Ext.Msg.alert('提示', action.result.msg, function(){
                                        basic.reset();
										Ext.getCmp('verify').loadCodeImg();
										Ext.getCmp('username').focus();
                                    });
                                }
                            });
                        }
                    }
                }
			],
			buttonAlign : 'center',
            listeners: {
                afterRender: function(thisForm, options){
                    this.keyNav = Ext.create('Ext.util.KeyNav', this.el, {
                        enter: function(){
                            var btn = Ext.getCmp('loginbtn');
                            btn.handler();
                        },
                        scope: this
                    });
                }
            }
        }).show();

    });
</script>

</body> 
</html>
